在iOS Swift中将秒转换为小时？

Question

我曾尝试在Swift中倒计时，但是在几秒钟内就返回了输入。我想在几小时内返回输入。如何将秒数转换为小时数？

请参阅下面的代码：

var remainingTime: NSTimeInterval = 0
var endDate: NSDate!
var timer = NSTimer()
var timerCounter:NSTimeInterval!

override func viewDidLoad() {
    super.viewDidLoad()

    remainingTime = 7200.0   //--> Here I Want to give input in hours like 2 hours or 3 hours not in seconds.

    let (h,m,s) = secondsToHoursMinutesSeconds(7200)
    print ("\(h) Hours")

    endDate = NSDate().dateByAddingTimeInterval(remainingTime)   // set your future end date by adding the time for your timer

    timer = NSTimer.scheduledTimerWithTimeInterval(0.4, target: self, selector: "updateLabel", userInfo: nil, repeats: true)  // create a timer to update your label

}

func updateLabel()
{
    timerlbl.text = endDate.timeIntervalSinceNow.hmmss
}

func secondsToHoursMinutesSeconds (seconds : Int) -> (Int, Int, Int) {
    return (seconds / 3600, (seconds % 3600) / 60, (seconds % 3600) % 60)
}